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Category:   OS (UNIX)  >   IBM AIX Vendors:   IBM
IBM AIX LDAP Bug Lets Remote Users Bypass Authentication
SecurityTracker Alert ID:  1025273
SecurityTracker URL:  http://securitytracker.com/id/1025273
CVE Reference:   CVE-2011-1561   (Links to External Site)
Updated:  Apr 7 2011
Original Entry Date:  Mar 31 2011
Impact:   User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 6.1.6.4
Description:   A vulnerability was reported in IBM AIX. A remote user can login with the wrong password.

On systems that have installed bos.rte.security 6.1.6.4 fileset, a remote user can login with an incorrect password.

When a LDAP user account authtype is set to ldap_auth in the '/etc/security/ldap/ldap.cfg' file, the account is affected.

When a non-LDAP user account has their SYSTEM attribute in the '/etc/security/user' file set to SYSTEM = "LDAP or compat" or when the default stanza is set to SYSTEM = "LDAP or compat" and local users do not have their SYSTEM attribute set in their own stanza, the account is affected.

Impact:   A remote user can login with the wrong password.
Solution:   The vendor has issued a fix (APAR IZ97416), available at:

http://aix.software.ibm.com/aix/efixes/security/ldapauth_fix.tar
ftp://aix.software.ibm.com/aix/efixes/security/ldapauth_fix.tar

The vendor's advisory is available at:

http://aix.software.ibm.com/aix/efixes/security/ldapauth_advisory.asc

Vendor URL:  aix.software.ibm.com/aix/efixes/security/ldapauth_advisory.asc (Links to External Site)
Cause:   Authentication error

Message History:   None.


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